Re: Measuring output watts with an oscilloscope

Hans Summers
 

Hi Richard

Great article, but one nit-pick! You say " If we took an infinite series of voltage measurements along the sinewave, and squared them, and then took their average, we'd end up with Vrms. " You need to take the square root of the average to get Vrms. (That's the R in RMS).

Yes correct, and well-spotted. I was just checking to see who was paying attention :-/   I have fixed it now! http://www.qrp-labs.com/qcx/rfpower.html

73 Hans G0UPL

Join QRPLabs@groups.io to automatically receive all group messages.